<!-- uniapp vue2 markdown解析 -->
<template>
  <view class="ua__markdown">
    <!--    <rich-text space="nbsp" :nodes="parseNodes(source)" :selectable="true" :user-select="true"-->
    <!--               @itemclick="handleItemClick"></rich-text>-->
    <mp-html :content="parseNodes(source)" :markdown="false" :selectable="selectable"></mp-html>
  </view>
</template>

<script>
import MarkdownIt from './lib/markdown-it.min.js'
import hljs from './lib/highlight/uni-highlight.min.js'
import './lib/highlight/atom-one-dark.css'
import parseHtml from './lib/html-parser.js'
import MpHtml from "./mp-html/mp-html.vue";

export default {
  components: {MpHtml},
  props: {
    source: String,
    showLine: {type: [Boolean, String], default: true},
    selectable: {type: [Boolean, String], default: true}
  },
  data() {
    return {
      markdown: null,
      copyCodeData: [],
    }
  },
  mounted() {
    let that = this
    let tempData = []
    this.markdown = MarkdownIt({
      html: true,
      highlight: function (str, lang) {
        let preCode = ""
        try {
          preCode = hljs.highlightAuto(str).value
        } catch (err) {
          preCode = that.markdown.utils.escapeHtml(str);
        }
        const lines = preCode.split(/\n/).slice(0, -1)
        // 添加自定义行号
        let html = lines.map((item, index) => {
          if (item == '') {
            return ''
          }
          return '<li><span class="line-num" data-line="' + (index + 1) + '"></span>' + item + '</li>'
        }).join('')
        if (that.showLine) {
          html = '<ol style="padding: 0px 30px;">' + html + '</ol>'
        } else {
          html = '<ol style="padding: 0px 7px;list-style:none;">' + html + '</ol>'
        }

        tempData.push(str)
        that.copyCodeData = tempData
        let htmlCode = `<div class="markdown-wrap">`
        // #ifndef MP-WEIXIN
        htmlCode += `<div style="color: #FFFFFF;text-align: right;font-size: 12px;padding:8px;">`
        htmlCode += `${lang}<a class="copy-btn" code-data-index="${tempData.length - 1}" style="margin-left: 8px;">复制代码</a>`
        htmlCode += `</div>`
        // #endif
        htmlCode += `<pre class="hljs" style="padding:10px 8px 0;margin-bottom:5px;overflow: auto;display: block;border-radius: 5px;"><code>${html}</code></pre>`;
        htmlCode += '</div>'
        return htmlCode
      }
    })
  },
  methods: {
    isJSONRegex(str) {
      const jsonRegex = /^\s*({.*})\s*$/;
      return jsonRegex.test(str);
    },
    parseNodes(test) {
      let value = test
      if (this.isJSONRegex(value)) {
        value = !!JSON.parse(value).text ? JSON.parse(value).text : value
      }
      if (!value) return
      if (!this.markdown) return
      // 解析<br />到\n
      value = value.replace(/<br>|<br\/>|<br \/>/g, "\n")
      value = value.replace(/&nbsp;/g, " ")
      let htmlString = ''
      if (value.split("```").length % 2) {
        let mdtext = value
        if (mdtext[mdtext.length - 1] != '\n') {
          mdtext += '\n'
        }
        htmlString = this.markdown.render(mdtext)
      } else {
        htmlString = this.markdown.render(value)
      }
      // 解决小程序表格边框型失效问题
      htmlString = htmlString.replace(/<table/g, `<table class="table"`)
      htmlString = htmlString.replace(/<tr/g, `<tr class="tr"`)
      htmlString = htmlString.replace(/<th>/g, `<th class="th">`)
      htmlString = htmlString.replace(/<td/g, `<td class="td"`)
      htmlString = htmlString.replace(/<hr>|<hr\/>|<hr \/>/g, `<hr class="hr">`)
      // 处理图片溢出问题
      htmlString = htmlString.replace(/<img/g, `<img style="width:100%;height:auto;"`)

      // #ifndef APP-NVUE
      return htmlString
      // #endif

      // 将htmlString转成htmlArray，反之使用rich-text解析
      // #ifdef APP-NVUE
      return parseHtml(htmlString)
      // #endif
    },
    handleItemClick(e) {
      let {attrs} = e.detail.node
      let {"code-data-index": codeDataIndex, "class": className} = attrs
      if (className == 'copy-btn') {
        uni.setClipboardData({
          data: this.copyCodeData[codeDataIndex], showToast: false,
          success() {
            uni.showToast({
              title: '复制成功', icon: 'none'
            });
          }
        })
      }
    }
  }
}
</script>

<style lang="scss" scoped>
.ua__markdown {
  font-size: 28rpx;
  font-family: Source Han Sans CN, Source Han Sans CN;
  font-weight: 400;
  color: #000000;
  line-height: 1.8;
  word-break: break-all;

  h1, h2, h3, h4, h5, h6 {
    font-family: inherit;
    font-weight: 500;
    line-height: 1.1;
    color: inherit;
  }

  h1, h2, h3 {
    margin-top: 20px;
    margin-bottom: 10px
  }

  h4, h5, h6 {
    margin-top: 10px;
    margin-bottom: 10px
  }

  .h1, h1 {
    font-size: 36px
  }

  .h2, h2 {
    font-size: 30px
  }

  .h3, h3 {
    font-size: 24px
  }

  .h4, h4 {
    font-size: 18px
  }

  .h5, h5 {
    font-size: 14px
  }

  .h6, h6 {
    font-size: 12px
  }

  a {
    background-color: transparent;
    color: #2196f3;
    text-decoration: none;
  }

  hr, ::v-deep .hr {
    margin-top: 20px;
    margin-bottom: 20px;
    border: 0;
    border-top: 1px solid #e5e5e5;
  }

  img {
    max-width: 100rpx;
  }

  p {
    margin: 0 0 10px
  }

  em {
    font-style: italic;
    font-weight: inherit;
  }

  ol, ul {
    margin-top: 0;
    margin-bottom: 10px;
    padding-left: 40px;
  }

  ol ol, ol ul, ul ol, ul ul {
    margin-bottom: 0;
  }

  ol ol, ul ol {
    list-style-type: lower-roman;
  }

  ol ol ol, ul ul ol {
    list-style-type: lower-alpha;
  }

  dl {
    margin-top: 0;
    margin-bottom: 20px;
  }

  dt {
    font-weight: 600;
  }

  dt, dd {
    line-height: 1.4;
  }

  .task-list-item {
    list-style-type: none;
  }

  .task-list-item input {
    margin: 0 .2em .25em -1.6em;
    vertical-align: middle;
  }

  pre {
    position: relative;
    z-index: 11;
  }

  code, kbd, pre, samp {
    font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
  }

  code:not(.hljs) {
    padding: 2px 4px;
    font-size: 90%;
    color: #c7254e;
    background-color: #ffe7ee;
    border-radius: 4px;
  }

  code:empty {
    display: none;
  }

  pre code.hljs {
    color: var(--vg__text-1);
    border-radius: 16px;
    background: var(--vg__bg-1);
    font-size: 12px;
  }

  .markdown-wrap {
    font-size: 12px;
    margin-bottom: 10px;
  }

  pre.code-block-wrapper {
    background: #2b2b2b;
    color: #000000;
    border-radius: 4px;
    overflow-x: auto;
    padding: 1em;
    position: relative;
  }

  pre.code-block-wrapper code {
    padding: auto;
    font-size: inherit;
    color: inherit;
    background-color: inherit;
    border-radius: 0;
  }

  .code-block-header__copy {
    font-size: 16px;
    margin-left: 5px;
  }

  abbr[data-original-title], abbr[title] {
    cursor: help;
    border-bottom: 1px dotted #777;
  }

  blockquote {
    padding: 10px 20px;
    margin: 0 0 20px;
    font-size: 17.5px;
    border-left: 5px solid #e5e5e5;
  }

  blockquote ol:last-child, blockquote p:last-child, blockquote ul:last-child {
    margin-bottom: 0
  }

  blockquote .small, blockquote footer, blockquote small {
    display: block;
    font-size: 80%;
    line-height: 1.42857143;
    color: #777
  }

  blockquote .small:before, blockquote footer:before, blockquote small:before {
    content: '\2014 \00A0'
  }

  .blockquote-reverse, blockquote.pull-right {
    padding-right: 15px;
    padding-left: 0;
    text-align: right;
    border-right: 5px solid #eee;
    border-left: 0
  }

  .blockquote-reverse .small:before, .blockquote-reverse footer:before, .blockquote-reverse small:before, blockquote.pull-right .small:before, blockquote.pull-right footer:before, blockquote.pull-right small:before {
    content: ''
  }

  .blockquote-reverse .small:after, .blockquote-reverse footer:after, .blockquote-reverse small:after, blockquote.pull-right .small:after, blockquote.pull-right footer:after, blockquote.pull-right small:after {
    content: '\00A0 \2014'
  }

  .footnotes {
    -moz-column-count: 2;
    -webkit-column-count: 2;
    column-count: 2
  }

  .footnotes-list {
    padding-left: 2em
  }

  table, ::v-deep .table {
    border-spacing: 0;
    border-collapse: collapse;
    width: 100%;
    max-width: 65em;
    overflow: auto;
    margin-top: 0;
    margin-bottom: 16px;
  }

  table tr, ::v-deep .table .tr {
    border-top: 1px solid #e5e5e5;
  }

  table th, table td, ::v-deep .table .th, ::v-deep .table .td {
    padding: 6px 13px;
    border: 1px solid #e5e5e5;
  }

  table th, ::v-deep .table .th {
    font-weight: 600;
    background-color: #eee;
  }

  .hljs[class*=language-]:before {
    position: absolute;
    z-index: 3;
    top: .8em;
    right: 1em;
    font-size: .8em;
    color: #999;
  }

  .hljs[class~=language-js]:before {
    content: "js"
  }

  .hljs[class~=language-ts]:before {
    content: "ts"
  }

  .hljs[class~=language-html]:before {
    content: "html"
  }

  .hljs[class~=language-md]:before {
    content: "md"
  }

  .hljs[class~=language-vue]:before {
    content: "vue"
  }

  .hljs[class~=language-css]:before {
    content: "css"
  }

  .hljs[class~=language-sass]:before {
    content: "sass"
  }

  .hljs[class~=language-scss]:before {
    content: "scss"
  }

  .hljs[class~=language-less]:before {
    content: "less"
  }

  .hljs[class~=language-stylus]:before {
    content: "stylus"
  }

  .hljs[class~=language-go]:before {
    content: "go"
  }

  .hljs[class~=language-java]:before {
    content: "java"
  }

  .hljs[class~=language-c]:before {
    content: "c"
  }

  .hljs[class~=language-sh]:before {
    content: "sh"
  }

  .hljs[class~=language-yaml]:before {
    content: "yaml"
  }

  .hljs[class~=language-py]:before {
    content: "py"
  }

  .hljs[class~=language-docker]:before {
    content: "docker"
  }

  .hljs[class~=language-dockerfile]:before {
    content: "dockerfile"
  }

  .hljs[class~=language-makefile]:before {
    content: "makefile"
  }

  .hljs[class~=language-javascript]:before {
    content: "js"
  }

  .hljs[class~=language-typescript]:before {
    content: "ts"
  }

  .hljs[class~=language-markup]:before {
    content: "html"
  }

  .hljs[class~=language-markdown]:before {
    content: "md"
  }

  .hljs[class~=language-json]:before {
    content: "json"
  }

  .hljs[class~=language-ruby]:before {
    content: "rb"
  }

  .hljs[class~=language-python]:before {
    content: "py"
  }

  .hljs[class~=language-bash]:before {
    content: "sh"
  }

  .hljs[class~=language-php]:before {
    content: "php"
  }
}
</style>
